method invocation on property accessed through getter

gistfile1.txt

// case on accessing the data by given fields
GET /api/person/10?fields=name,address,phone,delete

// api function
$person = Entity\Person::find($id);

if(!isset($_GET['fields']))
  return $person->toArray();

$fields = explode(',', $_GET['fields']);

$data = array();

// delete method gets invoked.
foreach($fields as $field)
    $data->$field = $person;
    
return $data;